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VALVE STEM SEAL is a critical core sealing component for marine diesel engines. Made of high-quality heat-resistant, wear-resistant and oil-resistant materials, it controls lubricating oil intake into the combustion chamber and prevents exhaust gas leakage along the valve stem. It features precise dimensional accuracy, stable structural performance and excellent fatigue resistance, suitable for routine servicing, shipyard overhaul and fault repair under marine harsh working conditions.
A well-matched valve stem seal stabilizes engine lubrication condition, avoids excessive oil consumption and exhaust smoke, reduces component failure risks and equipment downtime, and ensures efficient and reliable operation of marine engine units.
Please provide equipment model, specifications and part number before ordering to confirm compatibility.
PS26 VALVE STEM SEAL | Ship Machinery Engine Parts
The PS26 Valve Stem Seal is a precision sealing component specially designed for DAIHATSU PS26 series marine diesel engines. Installed on the valve guide assembly, this valve stem seal controls the lubricating oil flow between valve stem and guide, preventing excessive oil from entering the combustion chamber while blocking high-temperature exhaust gas from leaking into the valve train. It maintains proper oil film lubrication for valve stem under alternating temperature and pressure, reducing friction wear and avoiding blue smoke and carbon buildup inside cylinder. Aged, hardened or cracked valve stem seal will lead to engine oil consumption, carbon deposit accumulation and exhaust smoke abnormality. Replacing with standard PS26 Valve Stem Seal restores oil control and gas sealing performance and guarantees stable operation of DAIHATSU PS26 marine diesel engines.
Working under harsh marine operating conditions including long-time full-load continuous navigation, frequent thermal shock, reciprocating friction and cabin salt-fog corrosion, the valve stem seal will gradually suffer rubber aging, lip wear and elasticity loss after thousands of operating hours. Damaged valve stem seal causes oil burning, valve sticking and accelerated wear of valve and valve guide. Regular inspection and replacement of valve stem seal are essential routine maintenance and dry-dock overhaul items for DAIHATSU PS26 marine diesel engines.
This dedicated PS26 valve stem seal adopts premium fluorine rubber composite material with excellent heat resistance and wear resistance. Precision molded sealing lip keeps stable contact pressure on valve stem surface during reciprocating movement, realizing accurate oil metering and gas isolation. It can maintain good elasticity and sealing property under repeated high temperature cycles and reciprocating friction, effectively preventing oil leakage and gas blow-by.
With outstanding anti-aging performance and marine salt fog corrosion resistance, the valve stem seal adapts to complex and variable ship operating conditions including frequent start-stop, variable load operation and humid salt-fog cabin environment. It effectively reduces valve train failure rate, lowers daily maintenance and oil consumption costs, and greatly improves the operational safety, stability and service cycle of DAIHATSU PS26 marine diesel engines.
The PS26 Valve Stem Seal is manufactured from premium heat-resistant fluorine rubber material, specially customized for high temperature and reciprocating friction working environment of DAIHATSU PS26 marine diesel engine. Integrated injection molding eliminates internal material defects. Strict aging test ensures no permanent deformation under long-term thermal cycling. Key sealing lip adopts precision finishing treatment to control lip contact angle and surface smoothness. The whole production process fully complies with DAIHATSU OEM technical standards and universal marine diesel industry manufacturing specifications.
Quantified Marine-Grade Performance Parameters
Parameter | Specification | Test & Implementation Standard |
Core Material | Fluorine rubber with metal reinforcement frame | Raw material spectrum component inspection |
Surface Treatment | Precision lip molding, anti-aging surface treatment | Lip rebound & heat aging inspection |
Dimensional Tolerance | OEM-level inner & outer diameter tolerance | CMM full-dimensional precision detection |
Mechanical Performance | Reciprocating wear resistance, oil control, gas sealing | Friction cycle & tightness test |
Working Stability | High temperature resistant, anti-aging, salt fog resistant | High temperature thermal cycle simulation test |
Service Feature | Control lubricating oil, prevent exhaust gas leakage | Valve assembly matching test |
Compliance Standard | Universal marine industrial manufacturing specifications | DAIHATSU OEM & marine diesel industry norms |
All PS26 Valve Stem Seals are manufactured strictly in accordance with DAIHATSU OEM engineering drawings and marine engine valve train sealing component standards. Every finished seal undergoes raw material verification, injection molding, heat aging calibration and lip surface inspection. Key inner diameter, lip tension, rubber hardness and outer dimension are fully controlled to ensure perfect matching with PS26 valve stem and valve guide.
Each valve stem seal passes strict pre-delivery full inspection, including full dimensional calibration, surface defect screening, oil tightness test and assembly matching test. All technical parameters completely match original equipment standards, supporting direct drop-in replacement without secondary processing, effectively reducing oil consumption and improving post-overhaul operational stability.
MAIN ENGINE | MAN B&W | S26MC,L/S35MC,L/S42MC,L/S50MC,L/S60MC,L/S70MC,L/S80MC,L/S90MC,S46MC-C,S50MC-C,S60MC-C,S70MC-C,S80MC-C,S90MC-C,K90MC-C,K98MC-C,K/L45GF(CA),55GF(CA),67GF(CA),80GF(CA),90GF(CA) |
WARTSILA | 6L20,9L20,8L32,R22,R32,L20,L32 | |
PIELSTICK | PC2-2,PC2-5,PC2-5L,PC2-5V,PC2-6,PA4,PA5,PA6 | |
HANSHIN | EL30-44,ELS-35,44,LH-28G,LU24-54,LUN28AR(G),LUS24-58,LF46-58 | |
NIIGATA | 16HS,16X,18CX,19HX,20AX,25BX,25CX,26AFTE,26KGHS,28AFTE,28BX,28KGHS,31EZ,31X,32CLX,34AFTE | |
SULZER | RTA38,RTA48,RTA52,RTA58,RTA62,RTA68,RTA72,RTA76,RTA84,RL(A/B)56,RL(A/B)66,RL(A/B)76, RL(A/B)90,RND68,RND76 | |
AKASAKA | A31,A34,A38,A41,A45,AH25,AH27,AH28,AH30,AH38,AH40,K28,K31,DM28FD,DM38FD,DM40FD,DM51SS | |
MITSUBISHI | UEC33LSE,UEC37LA,UEC45LA,UEC50LS,UEC52LA,UEC52LS,UEC60LS,UET45/75C,UET45/80D, UET52/90D,UET52/105H | |
AUX.ENGINE | MITSUBISHI | S6A,S6B,S6R,S6N,S16N,S16R,S12R,SA2 |
MAN B&W | 16/24,20/27,21/31,23/30,25/33,28/32,32/40,48/60,58/64 | |
YANMAR | HAL,KL,KDL,KFL,RAL,MAL,S165,S185,M200,M220,T220,T240,T260,Z280,N165,N18,N21,N165,N260,N280, N330,NY16,EY18,EY22,EY26,4CHL,6CHL | |
DAIHATSU | DK20,DK26,DK28,DK32,DL16,DL19,DL20,DL22,DL24,DL26,DL28,DL32,DS18,DS19,DS22,DS26,DS28,DS32, DS40,PK14,PK16,PL24,PL26,PS18,PS20,PS22,PS26,PS30 |
We supply full-series matching spare parts for DAIHATSU PS26 engine valve train overhaul, including intake & exhaust valve, valve guide, valve seat, valve spring, spring retainer and complete valve overhaul kits, providing one-stop procurement solutions for shipyards, shipping companies and marine engine maintenance suppliers.
Each batch of PS26 Valve Stem Seals undergoes full-process professional inspection and performance screening, including raw material spectrum analysis, metallographic structure detection, full dimensional calibration, oil tightness test and thermal aging test. All inspection data and test records are completely archived for customer review and ship dry-dock overhaul audit.
Manufactured in strict compliance with universal marine diesel industry norms and DAIHATSU OEM technical specifications, this valve stem seal fully meets the operational demands of daily ship navigation and engine overhaul projects, serving as high-quality matching replacement parts for marine ship diesel engines.
The valve stem seal is a core precision sealing component of DAIHATSU PS26 engine valve train system. Long-term high-temperature thermal cycling, reciprocating friction and marine salt-fog corrosion will cause lip wear, rubber hardening and elasticity loss. Replace the valve stem seal during major overhaul if seal aging, oil burning or abnormal exhaust smoke is detected. Installing new standard PS26 Valve Stem Seal restores accurate oil control function, reduces lube oil consumption and prevents carbon accumulation on valve and piston.
Regular inspection of exhaust smoke and oil consumption is an essential dry-dock maintenance work for DAIHATSU PS26 marine diesel engines. Long-term continuous operation will cause aging and wear of valve stem seals. Timely inspection and replacement can effectively avoid excessive oil consumption, blue smoke and valve carbon deposit, eliminating hidden operational risks and ensuring stable and safe operation of ship power equipment.
Which engine does this valve stem seal fit?
This valve stem seal is specially customized for DAIHATSU PS26 series marine ship diesel engines, also compatible with multiple mainstream marine main and auxiliary engine models listed above. Please provide complete engine model or original part number for accurate matching confirmation.
What is the delivery time?
Standard PS26 Valve Stem Seals are in stock with 7–10 working days fast delivery. Non-standard customized specifications support 7–15 working days production cycle.
Can you provide customized processing services?
Yes, we support OEM customization and non-standard processing according to customer drawings and samples. All customized products undergo full-dimensional inspection and performance testing before shipment.
What is your warranty policy?
12-month warranty for material and manufacturing defects. We provide professional after-sales technical support including installation guidance and assembly parameter verification.
What is the MOQ and export packaging?
MOQ is 1 unit for in-stock products, with favorable bulk discount for fleet batch orders. Standard export packaging adopts anti-rust oil treatment, moisture-proof wrapping and solid plywood crating, adapting to long-distance ocean transportation and overseas storage.
